Rib andre parrot



(No Model.) 4' SheetaF-She'et 1.

G. MQA. PARROT &-A. UREIG-NIER. DYNAMO ELECTRIC MACHINE.

No. 491,294. Patented Feb. 7, 1893.

nnnnnnn 1s PCTERS my, PNOTO-UTHQ. 'wAsHmm-oN. o. c.

(No Model. 4 Sheets-Sheet 2. G. V. M. A. PARROT & A; G. REIGNIER.

DYNAMQELEGTRIG MACHINE.

Patented Feb. '7, 1893.

mH C

W4 fiat-4177p.

m: nonms Perms co wwovounlou WASHIN (No Model.) 4 Sheets-Sheet 3.

G. V. M. A. PARROT 86 A. G. R'EIGNIER. DYNAMO ELEGTRIOMAGHINB.

Patented Feb. 7, 1893.

firm/Maw h\ efim $80 (No Model.) 4 Sheets-Sheet 4.

G. v. M. ALPA'RROT & A. 0. REIGNIER.

DYNAMO ELECTRIC MACHINE.

No. 491.294. Patented Feb. 7, 1893.

UNITED STATES PATENT FFICE.

GABRIEL VALERY MARIE ANDRE PARROT AND ANTOINE CHARLE REIGNIER, OF PARIS, FRANCE.

DYNAMO-ELECTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No. 491,294, dated February '7, 1893.

Application filed A gust 8. 1892. Serial No. 442,065. (No model.) Patented in France August 28, 1889, No, 200,411, and November 9,1891,N0.21'7.803', in Belgium March 16, 1892, No. 98,821, and in England March 22, 1892, No. 5,654.

To aZZ whom it may concern.-

Be it known that we, GABRIEL VALERY MA- RIE ANDRIJ PARROT and ANTOINE CHARLES REIGNIER, of the city of Paris, France, have invented a Dynamo-Electric Machine, (for which We have obtained Letters Patent in France for fifteen years, dated August 28, 1889, No. 200,411, and November 9, 1891, No. 217,303; in Belgium for fifteen years, dated March 16, 1892, No. 98,821, and in England for fourteen years, dated March 22, 1892, No. 5,654,) of which the following is a full, clear, and exact description.

This invention relates to a dynamo electric machine of improved construction whereby an increased output or useful effect is obtained.

The invention consists essentially in the use, in the construction of the armature, of bi-metallic strips formed by rolling, and superposed on each other similar to plates in a voltaic battery, or such other manner as to eifect a most intimate contact of the two metals, viz: a magnetic metal and a good conductive metal of which the strips are composed. By preference, themetal of superior conductivity is placed outside, as the output, if the armature be constituted by the series copper-ironcopper, will be far greater for equal sections of the two compound metals than if it were formed of the series iron copper-iron. By this improved construction the usual magnetic core is dispensed with and therefore the consequent loss of energy, the iron strips contained in the bimetallic conductors fulfilling the function of a magnetic core, while utilizing the current set up in them. The copper situated at each side of the iron strips, collects almost the whole of the current, so that the bi-metallic conductor is capable of furnishing a very large quantity of electricity while insuring a relatively considerable magnetic induction without the use of a magnetic core.

Reference is to be had to the accompanying drawings forming part of this specification, wherein Figure 1 is a longitudinal vertical section, a portion being broken away; Fig. 2 a cross section on line y-z Fig. 1, and Fig. 3 a plan of our improved machine wherein the bimetallic copper-iron copper conductors are substituted for the covered copper wire of the ordinary armature coils. Figs. 4 and 5 are face views, partly in section, of the armature wound in drum form and ring form respectively. Fig. (3 is a cross section applicable to both forms of winding, and taken on lines 1-2 of Figs. 4. and 5 respectively.

In Figs. 1, 2 and 3, a are the field magnet cores carrying coils b and mounted on the standards 0 connected by stays (Z and fixed to a base plate m, N being the north, and S the south, pole pieces between which the disk armature revolves.

The windings of the armature are constituted by curved bi-metallic strips fitting within each other arranged in two j uxtaposed disks clamped together with transverse connections coupling the end of a strip of the one disk to the beginning of the next, the curvature of the strips being reversed in the two disks.

L are the curved bi-metallic strips sepa rated by insulating strips 8 q being the copper portions and "r the iron-portion of a bimetallic strip 10 are cross bars connecting a strip of the one disk to a strip of the other disk at the periphery of the armature, and t are similar cross bars connecting the inner end of a strip of the one disk to that of a strip of the other disk, t being prolongations of bars 25 leading to an ordinary Gramme collectorj Z.

(J is a metallic segmental flanged rim insulated by the intervening annulus D, and upon which is wound the wire binding f.

o is an insulating disk separating the bimetallic lamellar disks, and y are wedge shaped insulating segments between. the inner ends of adjacent bi-metallic strips.

a is a flanged insulating sheath between the disks and the two disk clamping collars h h forming the boss which is secured by a key or upon the shaft c.

e is the driving pulley, 7c the shaft bearings. v

The iron and the copper of the strips of each circuit are shown as being electrically connected in quantity.

In certain cases the iron contained in the br-metalhc strips may be completely insulated from the electric circuit which is in that case formed only by the copper of the strips the 1ron fulfilling only the function of a magnetic core.

The employment of the herein described bi-met'allic conductor is of advantage in all electro-magnetic inductive apparatus.

I claim- 1. A dynamo electric machine armature constructed of strips formed of two metals, the one being iron and the other copper and posed on each other substantially as described.

2. A dynamo electric machine armature constructed of two juxtaposed disks each constructed of lei-metallic strips, as specified, each strip of the one disk being electrically connected to a corresponding strip of the other disk, substantially as specified.

The foregoing specification of our dynamo electric machine signed by us this 19th of July, 1892.

GABRIEL VALERY MARIE ANDRE PARROT. ANTOINE CHARLES REIGNIER.

lVitnesses:

DENIS P. KEOGH, ALBERT MOREAU. 

